When running a compiled Ext JS Sencha app, an error is thrown that states "Uncaught TypeError: Object prototype may only be an

I recently integrated my Extjs application with a Sencha Cmd generated app in order to minify & concatenate js and css files. Despite the build process running smoothly, I encountered errors when trying to run the application.

The specific lines where the errors occurred are: and

My main inquiries are :

  1. Is Sencha Cmd the most dependable method for minifying & concatenating all files within an extjs application? While experimenting with Yuicompressor for individual file minification and manual concatenation, I struggled to manage the dependencies of the extJS application easily.
  2. How can I resolve the aforementioned issue stemming from the build created by Sencha Cmd? Could there be a step or aspect that I might have overlooked?

For reference, my setup includes ExtJS 4.2.1 and Sencha Cmd 4 (also attempted with version 5).

javascriptextjsextjs4sencha-cmd

Answer №1

After doing some research, I've managed to provide responses to both inquiries:

  1. Sencha Cmd effectively handles ext dependencies and utilizes yuicompressor internally for js minification. Converting an existing application into a Sencha Cmd application is successful as long as the `requires:` configuration is accurately specified in the ExtJS files.
  2. The issue mentioned earlier was a result of an error when copying and pasting code. There were unnecessary statements left in one of my views, causing the problem. Essentially, I was attempting to query a view that had not been instantiated. Once these statements were removed and the application (minified) recompiled, everything functioned properly.

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